Just a quick question....
How noisy are roller hyd lifters suppose to be...Fresh 383 about 1300 miles on new motor
They seem to clatter at about 1800-2200 rpm I have set them and reset them 3 times they still seem to be noisey....is there something wrong..?

Roller Hydraulic Lifters should be as quite as they come. I have heard that Comp Cams and components are not the greatest. I'm sure that will be mentioned again. Sounds like you may have a lifter or 2 or 3 bleeding down.

65Guera

04-23-2008 11:01 PM

what good components would be recommended to replace what I have...?

Greg T

04-23-2008 11:03 PM

Many rollers are noisy, especially GMs. Just listen to any ZZ4 and you'll hear them plain as day. Don't worry about it.

65Guera

04-23-2008 11:56 PM

Quote:

"Many rollers are noisy, especially GMs. Just listen to any ZZ4 and you'll hear them plain as day. Don't worry about it."

Thats cool...I hope so...I will make a sound clip and attach it tomorrow...then you guys can let me know if I just being picky...

sheldonw

04-24-2008 12:03 AM

A Friend of of mine runs that same grind in a very similar 383 and it too is very noisey...

65Guera

05-12-2008 02:55 AM

Ok I finally made the video so how do I post it.....?

pepi

05-12-2008 07:06 AM

Quote:

Originally Posted by Greg T

Many rollers are noisy, especially GMs. Just listen to any ZZ4 and you'll hear them plain as day. Don't worry about it.

exactly..... can here mine @ ideal and standing outside and to the sides of the engine bay .......

First off, that's a very good video! Most we see are crappy and have horrible sound.

Hmmm, kinda a tough call but to me, it sounds really noisey. We have a Comp roller with their 286 cam and it's pretty quiet compared to yours. Since you have a very loud exhaust and it still comes across as valve noise, i'd be suspect on it. Hopefully some of the others will give their opinion.

What rockers do you have on the heads?

Mark

65Guera

05-12-2008 12:17 PM

Thanks Jmark...
The rockers are the Comp Cams Pro Magnum 1.6

C-10

05-12-2008 12:31 PM

Yes great vid. Great sounding small block. Personally, the light valve train noise wouldn't bother me. Although I am used to mechanical rollers... :D .

I bet your valve covers are exaggerating the noise some. Sounds crazy but try a different pair before you resort to drastic measures.

Other than that, double check your lifter preload. The Comp hyd. roller lifters I have spec .030" of plunger preload, which happens to be a half-turn at the rocker with a 7/16 stud. I don't know what GM specs on theirs as far as preload.

spinn

05-12-2008 12:34 PM

agree
sounds can be, well....

65Guera

05-12-2008 12:47 PM

I readjusted them all 2 times yesterday....set to TDC spun the pushrod till it gave resistance then I went 3/4 turn and locked them down....Also my
harmonic balancer has a mark called VERTICAL TDC and then the timing marks starting with 0........10........20.........30 etc
I set at the the TDC at this Vertical TDC, was that the right thing to do or should I have set it at o...?
its a Professional Products Harmonic Balancer

C-10

05-12-2008 01:18 PM

A quote from the Professional Products damper instructions:

We have made a running change in our 6-3/4" SB Chevy 350 dampers #80000 and #90000 by adding another TDC mark which is labeled "Vertical TDC." This is for those engines produced from 1984 to 1995 which have the TDC mark at
the top of the balancer and are timed by looking down behind the water pump
to view the timing pointer. Use an aftermarket timing tape if desired."

Use the '0' zero on your balancer.

Here is what I do for adjusting lash and preload, This method works best with degreed balancers with marks every 90 deg.

Start with zero, #1 on TDC. Adjust #1 Intake and Exhaust, rotate engine clockwise with turning socket by hand 90 deg. and adjust #8 Intake and Exhaust...then another 90 deg. and so on.. 1,8,4,3,6,5,7,2. and you are done. Basically you are following all the TDC events in the firing order. Two full turns of the engine is all you need.